X0206 3 2022-04-11 0 0001092662 CHEMBIO DIAGNOSTICS, INC. CEMI 0001924002 Angelico Paul C/O CHEMBIO DIAGNOSTICS, INC. 555 WIRELESS BOULEVARD HAUPPAUGE NY 11788 true See remarks Common Stock 7885 D Incentive stock options 5.61 2026-10-27 Common Stock 29883 D Incentive stock options 4.65 2031-03-14 Common Stock 65476 D Restricted stock units Common Stock 10594 D Restricted stock units Common Stock 15771 D The incentive stock options are scheduled to vest in three equal installments on October 28 of each of 2020, 2021 and 2022, subject to continued service through each vesting date. The incentive stock options are scheduled to vest in four equal installments on March 15 of each of 2022, 2023, 2024 and 2025, subject to continued service through each vesting date. The restricted stock units are scheduled to vest on October 28, 2022, subject to continued service through each vesting date. Each restricted stock unit represents a contingent right to receive one share of common stock. The restricted stock units are scheduled to vest in two equal installments on March 15 of each of 2023 and 2024, subject to continued service through each vesting date. Executive Vice President and Chief Operations Officer Exhibit List: Exhibit 24 - Power of Attorney /s/ Mark L. Johnson, Attorney-in-Fact for Paul Angelico 2022-04-27